davidson



(No Model.) 3 SheetsSheet 2.

J. DAVIDSON. PROGRAM CLOCK.

' No. 595,767. Patented Dec. 21,1897.

WFTNFEIE sNvENTm K Li v AQd/Mikm LC/l (No Model.) 3 Sheets-Sheet 3.

J. DAVIDSON.

PROGRAM CLOCK.

No. 595,767. Patented Dec. 21. 1897.-

Ya: mum vmzns co. wow umn, WASHINGTON, u c.

UNITED STATES PATENT ErrcE.

JOHN DAVIDSON, OF LONDON, ENGLAND, ASSIGNOR OF ONE-HALF TO THE AUTOMATIC MEMORANDUM CLOCK COMPANY, LIMITED, OF SAME PLACE.

PROGRAM-CLOCK.

SPECIFICATION forming part of Letters Patent No. 595,767, dated December 21, 1897.

Application filed Dece b 9,1896. Serial No. 615,058. (No model.)

To all whom it may concern.- allow the latter to pass it, starts the alarm,

Be it known that 1, JOHN DAVIDSON, watchwhich may be either an electric or mechanmaker, a subject of the Queen of Great Britical one. 50

ain, residing at 42 Holborn Viaduct, in the An alarm-clock constructed according to city of London, England, have invented a new my invention is illustrated by the accompaand useful Improved Automatic Memorannying drawings, and by the aid of these I will dumClock, of which the following is a specinow further describe the same and the manfication. ner in which it may be carried into practical 55 This invention relates more particularly to effect.

that type of automatic memoranduni-clocks Of the drawings, Figure 1 is a sectional embraced in patent granted to me and numelevation, and Fig. 2 a plan, of a clock havbered 466,712, A. D. 1891, in which the starting a horizontal dial combined with an inking of an alarm is effected through the mestand. Fig. 3 is aplan view with parts broken 6o dium of tablets inserted in a drum revolved away to show the electrical connections.

I 5 by an ordinary clock-movement. In the frame a, which carries the ink-wells In clocks constructed and operating accord- Z), is secured a clock-movement c of any suiting to the above-mentioned patent the drum able construction, either by the aid of stays during its revolution drops the previouslyd or otherwise. 011 the spindle e of this 65 inserted tablets onto a platform, which is movement is mounted a drum f, divided into thereby operated to effect the starting of the a number of radial pockets suitably marked. alarm. Now my primary object is to dis- This drum carries an index-finger g, forming pense with the necessity of the tablets being the hour-hand of the clock and arranged to so dropped by arranging that these may opmove over an annular dial it, while the min- 70 crate the alarm as they revolve with the drum. ute-hand is arranged as in a clock of ordinary As constructed according to my presentinconstruction.

vention, the clock may be arranged with its The outer ends of the pockets in the drum dial in either a vertical or horizontal plane, are open, so that an arm or other portion opas desired, and I will describe one with a erating an alarm may project into the annu- 75 horizontal dial. lar recesses so formed to such an extent that Secured in a case or frame of suitable 0011- it will be operated as the drum revolves by struction is a clockmovement of any ordia previously-inserted tablet, such as 79, and nary type, and to the spindle of this, which an alarm sounded. usually carries the hour-hand, is secured a The alarm maybe an electric or mechanical 8o drum divided into a prearranged number of one, as desired; but as shown in the illus- 5 radial pockets suitably marked. An indextration it is electrical, the ends of the circuit finger forming the hour-hand is secured to being connected to the arm l and the contact or formed on the upper surface or edge of m, so that when said arm I is turned against this drum and moved over an annular dial, the pressure of a spring at bya tablet carried 85 while the usual minute-hand is arranged as by the drum striking one end of it its oppoheretofore in clocks of ordinary construction. site end will be forced against the contact on The outer ends of the radial pockets in the and so complete the circuit through the bell drum are open, and into the annular opening 0 and battery 13. thus formed in the periphery of the drum pro- The position of the switch or the like op- 90 jects one end of the operating lever or arm or crating the alarm may be indicated on the the like, which, when turned or operated as dial or otherwise, so that when the alarm is the drum revolves by a tablet previously instarted the required tablet maybe withdrawn serted in one or the other of the pockets to and examined, while the case a may be pro the contact extending into said open periphery and into the path of the tablets and the pointer and dial, substantially as described. 10

JOHN DAVIDSON.

vided with a hinged bezel a of suitable construction.

\Vhat I claim is A memorandum-clock comprising a rotary 5 drum having radial pockets extending vertically through the same at or near its periphery, the said periphery being open laterally,

lVitnesses:

F. J. BINGHAM, FRED O. HARRIS. 

